Asthma is a chronic disease that affects your airways. Your airways are tubes that carry air in and out of your lungs. If you have asthma, the inside walls of your airways become sore and swollen. That makes them very sensitive, and they may react strongly to things that you are allergic to or find irritating. When your airways react, they get narrower and your lungs get less air.

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What You Need To Know About Asthma and Complementary Health Practices
Asthma is a chronic lung disease that affects people ... cure, most people are able to control their asthma with conventional therapies and by avoiding the substances ...

... Data Brief Number 94, May 2012 Trends in Asthma Prevalence, Health Care Use, and Mortality in the ... National Health Care Surveys, National Vital Statistics System Asthma prevalence increased from 2001 to 2010 and is ...